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Finding the Fourth Proportional to 695,338.72, 959,342.72 and 389,369.28

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Solution

The fourth proportional to 695,338.72, 959,342.72 and 389,369.28 is: 537,203.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,338.72 : 959,342.72 = 389,369.28 : x
  2. Step 2: Convert to fraction form
    695,338.72/959,342.72 = 389,369.28/x
  3. Step 3: Cross multiply
    695,338.72x = 959,342.72 × 389,369.28
  4. Step 4: Simplify right side
    695,338.72x = 373,538,584,159.64
  5. Step 5: Solve for x
    x = 373,538,584,159.64/695,338.72
  6. Step 6: Final answer
    x = 537,203.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.